Condenser winding machine



w. F. FRISCH 2,310,071

CONDENSER WINDING MACHINE I Filed April 10, 1940 Ihventor": William F. Frisch,

His Attorney.

Patented Feb. 2, 1943 2,310,371 CONDENSER. WINDING MACHINE WiiliamF. Frisch,

Pittsfieid, Mass, assignor to General Electric Company, a corporation of New York Application April 10, 1940, Serial No. 328,830

4 Claims.

The present invention relates to machines for winding coil condensers.

The object of my invention is to provide an improved construction andarrangement in machines of this type permitting automatic high speed winding of condensers, and for a consideration of what! believe novel and my invention, attention is directed to the following description and the claims appended thereto.

In the accompanying drawing the single figure is a diagrammatic view of a condenser winding machine embodying my invention.

Referring to the drawing, the condenser is wound on a split mandrel fixed to a shaft 2 which is driven by a slip clutch comprising a part 3 fixed to the shaft and a part 4 loose on the shaft and frictionally connected to the part 3. Integral with the clutch part 4 is a gear 3 which is driven by a gear train comprising gears 3, I, 3, and I3.

Gears 3 and I are fixed to a shaft 3, the gearll being driven by a chain running over a gear l2 fixed to the shaft |3 of an electric motor l4.

The condenser comprises alternate strips of foil and of a dielectric, such as paper. The paper is fed to the mandrel from mils l3 rotatably carried on spindles l6 and passes from the rolls over auides I1 and between paper feeding rolls l3 and I3 to the mandrel. The foil is supplied from rolls 23 rotatably carried on spindles 2| and passes be- J tween foil feeding rolls 22 and 23 and between the paper feeding rolls i8 and I! to the mandrel. Guides 24 for the foil and paper are arranged below the paper feeding rolls l3 and I9. As hereinafter described, the paper and foil, are positively fed to the mandrel by the respective feeding rolls which normally rotate at a fixed speed.

It is therefore necessary that the mandrel be rotated to wind the foil and paper thereon at a speed suiiicient to take up the slack and that the proper mandrel speed will vary with the diameter of the foil and paper wound thereon. The proper mandrel speed is obtained by the slip clutch 3, 4 which is set to maintain a safe constant tension on the strips.

The paper feeding roll I3 is fixed to the shaft 3 and accordingly is driven by gear It. The roll I3 is positively driven from the shaft 3 by a gear 23 fixed to the shaft 3 meshing with a gear 21 fixed to the shaft 23 of the roll It. The roll l3 rotates on a fixed axis. The roll I3 is pressed against the roll I3 by a slide 23 carried in suitable guides (not shown) and ioumaled on the shaft 23. The slide 29 is pivotally connected to one end of a lever 33 pivoted intermediate its ends at 3|. A spring 32 connected to the other end of the lever 33 biases the lever in a clockwise direction about the pivot 3| and moves the roll l9 toward the roll it. The roll I9 is moved away from the roll II to render the paper feeding rolls inefi'ective by an eccentric 33 connected .by a link 34 to the lefthand end of the lever 30. A handle 33 is provided for rotating the eccentric. Upon rotation of the eccentric through a half revolution from the position shown, the link 34 is pulled downward, pivoting the lever 30 in a counterclockwise direction and moving the roll I! away from the roll II.

This releases the pressure between the rolls so that the paper is not fed even though the rolls are continuously rotated.

The foil feeding rolls 22 and 23 are driven at the same speed as the paper feeding rolls I3 and It by a chain 33 driven by a gear 31 fixed to the shaft 23 and running over gears 33 and 33 respectively fixed to one of the shafts 40 of each pair of foil feeding rolls. The foil feeding rolls are positively rotated by gears 4| fixed to the shafts 43. Each of the foil feeding mils 22 rotates on a fixed axis. The foil feeding rolls 23 are moved toward and away from the rolls 22 by slides 42 suitably carried in guides (not shown) and connected to the lower ends of links 43. The upper ends of the links 43 are connected to a block 44 which is connected to the lower end of a link 43 urged upward by a coil spring 43. Upward movement of the link 43 moves the slides 42 inward, yieldingly moving the rolls 23 into engagement with the rolls 22. The rolls 23 are moved away from the rolls 22 by an eccentric 41 connectedbyalink43toapin43onthelink44. a handle 33 is provided for rotating the eccentric. When the eccentric is rotated through a half revolution from the position shown, the link 44 is moved downward, moving the slides 42 outward and thereby moving the rolls 23 out of engagement with the rolls 22. when out of engagement the rolls 22 and 23 are ineffective to feed foil even though continuously rotated.

Below the guides 24 are paper cutters comprising rotatable cutters 3|, 3| fixed to shafts 32. The cutters 3|, 3| are rotatedin opposite directions by gears 33 fixed to the shafts 32, one of l the shafts being rotated by a rack 34 meshing with a pinion 33 connected to the shaft by a ratchet 3311. One end of the rack is connected to a solenoid l3, and the other end of the rack is connected to a tension spring 31 biasing the rack to the position illustrated. When the solenoid 33 is energized the rack 34 is moved to the left, causing the cutters 3|, 3| to be rotated in opposite directions a half revolution to sever the paper.

When the solenoid 56 is deenergized the parts are returned by the tension spring 51 to the position illustrated. During the return movement the ratchet 55a is ineffective and the knives remain stationary.

Below each of the foil feeding rolls 22 and 23 are foil cutters each comprising a stationary cutter blade 58 and a rotatable cutter blade 59. The cutter blades 59 are rotated by a solenoid 68 having a rack 6i meshing with a pinion 62 connected .to a ratchet 62a. which is effective during one direction of rotation of the pinion to rotate the cutter blade shafts 83 through gear trains comprising gears 64 fixed to the shafts 63 and gears 55 and 66. The solenoid 68 is biased to the position illustrated by a tension spring 61 connected to the free end of the rack 6|. .When the solenoid 58 is energized the rack 6| is moved to the left, causing the cutters 59 to be rotated through .the ratchet and gear trains described above. The cutter blades '59 are rotated through th complete revolution so that both edges of the cutter blades cooperate with the stationary cutter. This cuts a section out of the strip of foil being fed downward by the rolls 22 and 23, providing a gap between the severed ends of the foil. The sections which are cut out by the blades 59 fall to one side of the strips of foil and paper. Since both the paper feeding rolls and the foil feeding rolls rotate at the same speed, the downward movement of the foil and paper continues after the operation of the foil cutters, and the gap between the severed ends of the foil is maintained. When the solenoid 68 is deenergized the rack 6| is moved to the right by the spring 61, returning the parts to the position illustrated. The cutter blades 59 remain stationary during the return movement.

The operation of the machine is controlled by a drum 58 fixed to a shaft 69 keyed to a worm wheel 18. The worm wheel is driven by a worm II fixed to a shaft I2 and rotated by gears 13 and 13a meshing with the gear 8. The speed at which the drum is rotated, therefore, is directly proportional to the speed at which the foil and paper are fed to the mandrel. In other words, the rotation of the drum 68 is proportional to the length of paper and dielectric wound on the mandrel. The drum 68 is made of metaLand is connected to supply conductors I4 by a brush 15 connected by conductors l6 and 11 to a terminal 18 on the motor which in turn is connected to one of the supply conductors 14. The

.brush is mounted on one arm of a bell crank lever I9, the other arm of which is connected to a link 88. By pulling the link 88 forward the brush I may be lifted clear of the drum, opening the circuit thereto. The brush is held in the elevated or open circuit position by a pro- Jection 8| on the link 88 which cooperates with a stop 82. Upon moving the projection 8I clear of the stop 82 the brush may be returned to the position contacting the drum.

The motor II E started by closing a switch 83 connected in series with the conductor 11 and a conductor 84. The closing of the switch 83 closes a circuit extending from the motor terminal I8 through conductor I1 to the switch 83, and from the switch 83 through conductor 84, variable resistance 85, and conductor 86 to the other motor terminal 81. This starts the operation of the motor. The'motor starts at low speed since the resistance 85 is connected in series with the motor. As soon as the motor rotates the drum 68 to move'a brush 88 connected to the Junction of conductor 84 and resistance 85 clear ofv an insulating segment 89 on the drum, a circuit across the switch 89 is completed through conductor I6, brush l5, drum 68, and brush 88. The switch 83 may now be opened. At the same time that the brush 88 moves off the insulating segment 89, a brush 98 moves off an insulating seg- This connects a variable resistance 92 in parallel with the resistance 85, thereby decreasing the effective resistance in series with .the motor and increasing the motor speed.

The foil cutting solenoid 68 is controlled by a brush 93 which normally is kept out of contact with the drum by an insulating section 94. When the drum 68 turns to a position in which the brush 93 rests on the conducting segment 95, a circuit to the solenoid 88 is completed extending from motor terminal I8, conductor Tl, conductor l6, and brush 15 to the conducting segment 95, and from the conducting segment 95 through brush 93, conductor 96, solenoid 68, conductor 91, and conductor 86 to the motor terminal 81. This energizes the solenoid 68, causing the operation of the foil cutters 59. When the conducting segment 85 moves clear of the brush 93 the solenoid 68 is deenergized and the foil cutter rack 6| is returned to the position illustrated.

The paper cutters are controlled by a brush 98 which normally rides on an insulating section 99 on the drum. When the conducting section I88 on the drum moves under the brush, a circuit to the solenoid 56 is completed, extending from the motor terminal l8, through conductor 11, conductor I5, and brush I5 to the conducting segment I88, and from the conducting segment I88 through the brush 98, conductor I8I, solenoid 56, conductor I82, and conductor 86 to the motor terminal 81.v This energizes the solenoid 56, causing the operation of the paper cutters. When the conducting segment I88 moves from under the brush 98 the solenoid 56 is deenergized and the paper cutter rack 54 is returned to the position illustrated.

In the use of the winding machine the ends of the foil and paper are attached to the mandrel, and the rotation of the motor is started at its slow speed by closing the switch 83. The paper feeding rolls I8 and I9 and the foil feeding rolls 22 and 23 which are directly driven from the motor are rotated at a speed proportional to the motor speed, feeding the foil and paper toward the mandrel. The mandrel, which is driven from the slip clutch 3 and 4, rotates at a speed suflicient to take up the slack and maintain a constant tension on the foil and paper. The control drum 68 rotates at a speed proportional to the rate at which paper and foil are fed to the mandrel. In other words, the angular rotation of the drum 68 is proportional to the length of the foil and paper wrapped on the mandrel. The motor continues at its slow speed until the drum 68 rotates to a position in which the insulating segment 9I is clear of the brush 98. This connects the resistance 92 parallel with the resistance 85, thereby decreasing the resistance in series with the motor. At this time the brush 88 is clear of the insulating segment 89 and the switch 83 may be released. When the desired length of foil and paper have been wrapped on the mandrel, the conducting segment 95 makes contact with the brush 93, establishing a circuit to the foil cutting solenoid 68. The solenoid through the rack 6I rotates the foil cutting knives 59 through a complete revolution, cutting a section out of the foil and leaving a gap be.

tween the severed ends. The movement of the foil and paper toward the mandrel does not stop during the foil cutting operation. After cutting, the foil and paper below the cutters 59 are fed to the mandrel by the paper feeding rolls l8 and i9, and the foil above the cutters 59 is fed toward the mandrel by the foil feeding rolls 22 and 23, both feeding operations being at the same speed so the gap is maintained. Shortly before the foil cutting operation the motor is returned to its slow speed by the engagement of the brush 90 and the insulating segment 9i which opens the circuit to the resistance 92. When the gap between the severed ends of the foil comes opposite the paper cutters l, the paper cutting solenoid 56 is energized by the brush 98 engaging the conducting segment I00.

The paper cutters are synchronized with the foil cutters by the interconnecting gearing so that the paper cutters accurately sever the paper in the gap between the severed ends of the foil. After the operation of the paper cutters 5|, the feeding of the paper and foil continues until the lower ends project slightly below the mandrel. At this time the rotation of the motor is stopped by the movement of the insulating segment 89 under the brush 88, thereby opening the motor circuit.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. In a machine for winding coil condensers, means for supplying alternate strips of foil and dielectric, a mandrel, means for feeding the foil to the mandrel, means for feeding the dielectric to the mandrel, said dielectric feeding means being arranged between the mandrel and the foil feeding means, dielectric cutting means arranged between the dielectric feeding means and the mandrel, foil cutting means arranged between the foil feeding and dielectric feeding means, means for rotating the mandrel to wind the strips thereon at a speed sufficient to take up the slack in the strips fed thereto, means for operating the foil cutting means to cut a section out of the foil providing a gap between the severed ends, and means synchronized with said foil cutters for operating the dielectric cutting means to cut the dielectric in said gap.

2. In a machine for winding coil condensers, means for supplying alternate strips of foil and dielectric, a mandrel, means for feeding the strips to the mandrel, means operating proportionally to the size of the condenser wound on the mandrel for cutting a section out of the 011 leaving a gap between the severed ends, and means for thereafter cutting the dielectric in said 3. In a machine for winding coil condensers, means for supplying alternate strips of foil and dielectric, a. mandrel, means for feeding the strips to the mandrel, means for cutting a section out of the foil to provide a gap between the severed ends, and means operated in timed relation to the feeding means and the foil cutting means for cutting the dielectric in said gap.

4. In a machine for winding coil condensers, means for supplying alternate strips of foil and dielectric, a mandrel, means for feeding the foil to the mandrel, means for feeding the dielectric to the mandrel, said dielectric feeding means being arranged between the mandrel and the foilv feeding means, dielectric cutting means arranged between the dielectric feeding means and the mandrel, foil cutting means arranged between the foil feeding and dielectric feeding means, means for rotating the mandrel to wind the strips thereon at a speed sufiicient to take up the slack in the strips fed thereto, means operating proportionally to the size of the condenser wound on the mandrel for operating the foil cutting means to cut a section out of the foil providing a gap between the severed ends, and means operated in timed relation to the feeding of the strips and the operation of the foil cutting means for operating the dielectric cutting means to cut the dielectric in said gap.

WILLIAM F. IERISCH. 

